Finding the Third Proportional to 30,223 and 42,485

Step by Step Solution

1. Step 1: Write the proportion equation
   30,223 : 42,485 = 42,485 : x
2. Step 2: Convert to fraction form
   30,223/42,485 = 42,485/x
3. Step 3: Cross multiply
   30,223x = 42,485 × 42,485
4. Step 4: Simplify right side
   30,223x = 1,804,975,225
5. Step 5: Solve for x
   x = 1,804,975,225/30,223
6. Step 6: Final answer
   x = 59,721.91